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BOSTON MARATHON 2025

Karen Igo

Bib: 22837•F

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0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:04
Rank: #23764
Start → 5K
9:21/mi
29:04 split
10K· 6.21 mi
58:01
Rank: #23676 (+88)
5K → 10K
9:19/mi
28:57 split
15K· 9.32 mi
1:26:52
Rank: #23515 (+161)
10K → 15K
9:17/mi
28:51 split
20K· 12.43 mi
1:56:08
Rank: #23272 (+243)
15K → 20K
9:25/mi
29:16 split
Half· 13.11 mi
2:02:27
Rank: #23255 (+17)
20K → Half
9:16/mi
6:19 split
25K· 15.53 mi
2:25:37
Rank: #23034 (+221)
Half → 25K
9:33/mi
23:10 split
30K· 18.64 mi
2:56:45
Rank: #22756 (+278)
25K → 30K
10:01/mi
31:08 split
20M
3:10:56
Rank: #22700 (+56)
30K → 20M
10:26/mi
14:11 split
21M
3:22:15
Rank: #22658 (+42)
20M → 21M
11:19/mi
11:19 split
35K· 21.75 mi
3:30:55
Rank: #22797 (-139)
21M → 35K
11:35/mi
8:40 split
23M
3:44:22
Rank: #22775 (+22)
35K → 23M
10:45/mi
13:27 split
24M
3:55:16
Rank: #22791 (-16)
23M → 24M
10:54/mi
10:54 split
40K· 24.85 mi
4:04:07
Rank: #22739 (+52)
24M → 40K
10:21/mi
8:51 split
25.2M
4:08:02
Rank: #22717 (+22)
40K → 25.2M
11:21/mi
3:55 split
Finish· 26.22 mi
4:18:34
Rank: #22777 (-60)
25.2M → Finish
10:20/mi
10:32 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:02:27
Pace9:20 /mi
2nd Half
Distance13.11 mi
Time2:16:07
Pace10:23 /mi
📊Positive Split: 11.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:30:2929:049:2129:04
9:21
-
10K
6.21 mi11:59:2658:019:2028:57
9:19
-0:02
15K
9.32 mi12:28:171:26:529:1928:51
9:17
-0:02
20K
12.43 mi12:57:331:56:089:2129:16
9:25
+0:08
Half
13.11 mi13:03:522:02:279:206:19
9:16
-0:09
25K
15.53 mi13:27:022:25:379:2223:10
9:33
+0:17
30K
18.64 mi13:58:102:56:459:2931:08
10:01
+0:28
20M
20.00 mi14:12:213:10:569:3314:11
10:26
+0:25
21M
21.00 mi14:23:403:22:159:3811:19
11:19
+0:53
35K
21.75 mi14:32:203:30:559:428:40
11:35
+0:16
23M
23.00 mi14:45:473:44:229:4513:27
10:45
-0:50
24M
24.00 mi14:56:413:55:169:4810:54
10:54
+0:09
40K
24.85 mi15:05:324:04:079:498:51
10:21
-0:33
25.2M
25.20 mi15:09:274:08:029:513:55
11:21
+1:00
Finish
26.22 mi15:19:594:18:349:5210:32
10:20
-1:01

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

9:16 /mi

Average Pace

9:52 /mi

Slowest Pace

11:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:25:37

56% of race

Time at Steady Pace

1:04:42

25% of race

Time at Slower Pace

48:15

19% of race

Average Pace: 9:52 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:30:2929:049:2129:04
9:21
#23764
10K
6.21 mi11:59:2658:019:2028:57
9:19
#23676
15K
9.32 mi12:28:171:26:529:1928:51
9:17
#23515
20K
12.43 mi12:57:331:56:089:2129:16
9:25
#23272
Half
13.11 mi13:03:522:02:279:206:19
9:16
#23255
25K
15.53 mi13:27:022:25:379:2223:10
9:33
#23034
30K
18.64 mi13:58:102:56:459:2931:08
10:01
#22756
20M
20.00 mi14:12:213:10:569:3314:11
10:26
#22700
21M
21.00 mi14:23:403:22:159:3811:19
11:19
#22658
35K
21.75 mi14:32:203:30:559:428:40
11:35
#22797
23M
23.00 mi14:45:473:44:229:4513:27
10:45
#22775
24M
24.00 mi14:56:413:55:169:4810:54
10:54
#22791
40K
24.85 mi15:05:324:04:079:498:51
10:21
#22739
25.2M
25.20 mi15:09:274:08:029:513:55
11:21
#22717
Finish
26.22 mi15:19:594:18:349:5210:32
10:20
#22777
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi237649564956423175(Top 82%)9192(Top 75%)9192(Top 705%)
10K6.21 mi3.10 mi23676+889520+449520+4423592(Top 83%)9459(Top 77%)9459(Top 726%)
15K9.32 mi3.11 mi23515+1619420+1009420+10023175(Top 82%)9192(Top 75%)9192(Top 705%)
20K12.43 mi3.11 mi23272+2439271+1499271+14922643(Top 80%)8950(Top 73%)8950(Top 687%)
Half13.11 mi0.68 mi23255+179265+69265+622843(Top 80%)9059(Top 74%)9059(Top 695%)
25K15.53 mi2.42 mi23034+2219160+1059160+10522062(Top 78%)8685(Top 71%)8685(Top 667%)
30K18.64 mi3.11 mi22756+2789046+1149046+11421664(Top 76%)8596(Top 70%)8596(Top 660%)
20M20.00 mi1.36 mi22700+569048-29048-222261(Top 78%)9040(Top 74%)9040(Top 694%)
21M21.00 mi1.00 mi22658+429035+139035+1322201(Top 78%)9081(Top 74%)9081(Top 697%)
35K21.75 mi0.75 mi22797-1399131-969131-9625243(Top 89%)10709(Top 88%)10709(Top 822%)
23M23.00 mi1.25 mi22775+229142-119142-1122623(Top 80%)9408(Top 77%)9408(Top 722%)
24M24.00 mi1.00 mi22791-169171-299171-2923776(Top 84%)10010(Top 82%)10010(Top 768%)
40K24.85 mi0.85 mi22739+529157+149157+1421550(Top 76%)8960(Top 73%)8960(Top 688%)
25.2M25.20 mi0.35 mi22717+229155+29155+221705(Top 76%)9011(Top 74%)9011(Top 692%)
Finish26.22 mi1.02 mi22777-609207-529207-5223884(Top 84%)10112(Top 83%)10112(Top 776%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21stories
+97ft-345ft

Overall

23175

Females

9192

F50-54

9192

5K→10K

3.1 - 6.2 mi

Top 83%
×5stories
+79ft-138ft

Overall

23592

Females

9459

F50-54

9459

10K→15K

6.2 - 9.3 mi

Top 82%
×3stories
+67ft-78ft

Overall

23175

Females

9192

F50-54

9192

15K→20K

9.3 - 12.4 mi

Top 80%
×5stories
+106ft-86ft

Overall

22643

Females

8950

F50-54

8950

20K→Half

12.4 - 13.1 mi

Top 80%
×2stories
+19ft-37ft

Overall

22843

Females

9059

F50-54

9059

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

22062

Females

8685

F50-54

8685

25K→30K

15.5 - 18.6 mi

Top 76%
×9stories
+181ft-148ft

Overall

21664

Females

8596

F50-54

8596

30K→20M

18.6 - 20.0 mi

Top 78%
×5stories
+64ft-50ft

Overall

22261

Females

9040

F50-54

9040

20M→21M

20.0 - 21.0 mi

Top 78%
×8stories
+106ft-24ft

Overall

22201

Females

9081

F50-54

9081

21M→35K

21.0 - 21.8 mi

Top 89%
×7stories
+17ft-86ft

Overall

25243

Females

10709

F50-54

10709

35K→23M

21.8 - 23.0 mi

Top 80%
×5stories
+23ft-63ft

Overall

22623

Females

9408

F50-54

9408

23M→24M

23.0 - 24.0 mi

Top 84%
×6stories
+12ft-82ft

Overall

23776

Females

10010

F50-54

10010

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21550

Females

8960

F50-54

8960

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

21705

Females

9011

F50-54

9011

25.2M→Finish

25.2 - 26.2 mi

Top 84%
×2stories
+22ft-21ft

Overall

23884

Females

10112

F50-54

10112

Passing Analysis

Category:
Athletes Passed
1912
Passed By
925
Net Change
+987
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23764
5K → 10K281193+88#23764#23676
10K → 15K25089+161#23676#23515
15K → 20K28643+243#23515#23272
20K → Half3922+17#23272#23255
Half → 25K25938+221#23255#23034
25K → 30K31234+278#23034#22756
30K → 20M10246+56#22756#22700
20M → 21M9856+42#22700#22658
21M → 35K21160-139#22658#22797
35K → 23M8260+22#22797#22775
23M → 24M4965-16#22775#22791
24M → 40K7624+52#22791#22739
40K → 25.2M3311+22#22739#22717
25.2M → Finish2484-60#22717#22777
TOTALS1912925+987
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing